Check you have set the correct CNAME
If you're using HTTPS (manual setup) or HTTP, check that the the CNAME record set is set to:
If your workspace is hosted in the US - custom.intercom.help
If your workspace is hosted in Europe - custom.eu.intercom.help
If your workspace is hosted in Australia: custom.au.intercom.help
If you're using HTTPS (quick set up), check that the CNAME record is set to:
If your workspace is hosted in the US - us.intercomhelpcenter.com
If your workspace is hosted in Europe - eu.intercomhelpcenter.com
If your workspace is hosted in Australia: au.intercomhelpcenter.com
Note: HTTPS (quick set up) might not be available for your workspace
Pro tip: To check which region your workspace is hosted in, look at the URL bar of your browser when you're using Intercom.
If the URL beings with:
app.intercom.com, your workspace is hosted in the USapp.eu.intercom.com, your workspace is hosted in Europeapp.au.intercom.com, your workspace is hosted in Australia
Check that the CNAME changes have propagated
CNAME changes take some time to propagate. These might take up to 72 hours depending on your provider.
You can check if the CNAME change has propagated using a tool like MXToolbox.
Important: Make sure to use CNAME Lookup in MXToolbox
If you're using HTTPS (manual setup) - in this case, running a CNAME check would typically not return any data as there is no need for the DNS to be linked to an Intercom domain. The configuration is done within the service you set up to implement HTTPS.
Check your Cloudflare settings
If you're using Cloudflare, ensure that the cloud beside your CNAME record is orange and that you have set SSL in the "Crypto" section to either "Flexible" or "Full".
Important: Don’t choose ‘Full (Strict)’ as this will result in an invalid SSL certificate
Make sure your Help Center website is turned on
Head over to your Help Center settings and under Website publishing, make sure that the Turn on your Help Center website is toggled on.
Check your SSL certificate is valid
If your SSL certificate is managed via 3rd party provider, make sure that it is still valid.
Make sure you have at least one article published
If you're seeing Not found when trying to visit your Help Center, make sure that you have at least one article published. If there are no articles published, your Help Center will be inactive return Not found .
ERR_SSL_VERSION_OR_CIPHER_MISMATCH error
This error typically occurs when your old SSL and the new one are conflicting. Since HTTPS (quick setup) option already provides SSL, you should make sure that there is no other SSL certificate configured for this domain on your DNS provider's dashboard
Using Amazon CloudFront?
Ensure you are following all steps in the guide.
Using Custom Reverse Proxy?
Ensure guides are followed.
Sample CNAME lookup for a reverse proxy setup: will not find anything but will know which DNS server you utilize.
Hitting a 502 error when hitting custom.domain/robots.txt?
If you are using nginx (or ingress nginx) check your logs for:
“upstream sent too big header while reading response header from upstream”
If you find that message in your logs, you need to bump, in the annotation of your ingress (default is 4k):
nginx.ingress.kubernetes.io/proxy-buffer-size: "8k"
or http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_buffer_size in a vanilla nginx configuration.
That will resolve the problem with the 502 error when hitting custom.domain/robots.txt
Still running into issues?
If everything above looks to be in order and you're still running into issues, reach out to our Support team via the Messenger and they'll be happy to investigate this further for you!
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